Added Qt sinks

include/spdlog/sinks/qt_sinks.h

+// Copyright(c) 2015-present, Gabi Melman, mguludag and spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Custom sink for QPlainTextEdit or QTextEdit and its childs(QTextBrowser...
+// etc) Building and using requires Qt library.
+//
+
+#include "spdlog/common.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/synchronous_factory.h"
+#include "spdlog/sinks/base_sink.h"
+
+#include <QObject>
+#include <QPlainTextEdit>
+#include <QTextEdit>
+
+namespace _spdlog_p {
+namespace _sinks_p {
+//
+// Private class for QTextEdit and its derivatives
+//
+class qtextedit_sink_p : public QObject {
+  Q_OBJECT
+public:
+  qtextedit_sink_p(QTextEdit *textedit = nullptr) {
+    if (textedit != nullptr) {
+      textedit_ = textedit;
+      connect(this, &qtextedit_sink_p::append_text, textedit_,
+              &QTextEdit::append);
+    }
+  }
+
+  ~qtextedit_sink_p() {}
+
+  void append(const spdlog::string_view_t &str) {
+    emit append_text(
+        QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
+  }
+
+signals:
+  void append_text(const QString &);
+
+private:
+  QTextEdit *textedit_ = nullptr;
+};
+
+//
+// Private class for QPlainTextEdit
+//
+class qplaintextedit_sink_p : public QObject {
+  Q_OBJECT
+public:
+  qplaintextedit_sink_p(QPlainTextEdit *textedit = nullptr) {
+    if (textedit != nullptr) {
+      textedit_ = textedit;
+      connect(this, &qplaintextedit_sink_p::append_text, textedit_,
+              &QPlainTextEdit::appendPlainText);
+    }
+  }
+
+  ~qplaintextedit_sink_p() {}
+
+  void append(const spdlog::string_view_t &str) {
+    emit append_text(
+        QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
+  }
+
+signals:
+  void append_text(const QString &);
+
+private:
+  QPlainTextEdit *textedit_ = nullptr;
+};
+} // namespace _sinks_p
+} // namespace _spdlog_p
+
+//
+// qtextedit_sink class
+//
+namespace spdlog {
+namespace sinks {
+template <typename Mutex> class qtextedit_sink : public base_sink<Mutex> {
+public:
+  qtextedit_sink(QTextEdit *textedit = nullptr) {
+    if (textedit != nullptr) {
+      textedit_p =
+          std::make_shared<_spdlog_p::_sinks_p::qtextedit_sink_p>(textedit);
+    } else {
+      throw spdlog_ex("Error opening QTextEdit");
+    }
+  }
+
+  ~qtextedit_sink() { flush_(); }
+
+protected:
+  void sink_it_(const details::log_msg &msg) override {
+    memory_buf_t formatted;
+    base_sink<Mutex>::formatter_->format(msg, formatted);
+    string_view_t str_v = string_view_t(formatted.data(), formatted.size());
+    textedit_p->append(str_v);
+  }
+
+  void flush_() override {}
+
+private:
+  std::shared_ptr<_spdlog_p::_sinks_p::qtextedit_sink_p> textedit_p = nullptr;
+};
+
+//
+// qplaintextedit_sink class
+//
+template <typename Mutex> class qplaintextedit_sink : public base_sink<Mutex> {
+public:
+  qplaintextedit_sink(QPlainTextEdit *textedit = nullptr) {
+    if (textedit != nullptr) {
+      textedit_p = std::make_shared<_spdlog_p::_sinks_p::qplaintextedit_sink_p>(
+          textedit);
+    } else {
+      throw spdlog_ex("Error opening QPlainTextEdit");
+    }
+  }
+
+  ~qplaintextedit_sink() { flush_(); }
+
+protected:
+  void sink_it_(const details::log_msg &msg) override {
+    memory_buf_t formatted;
+    base_sink<Mutex>::formatter_->format(msg, formatted);
+    string_view_t str_v = string_view_t(formatted.data(), formatted.size());
+    textedit_p->append(str_v);
+  }
+
+  void flush_() override {}
+
+private:
+  std::shared_ptr<_spdlog_p::_sinks_p::qplaintextedit_sink_p> textedit_p =
+      nullptr;
+};
+
+#include "spdlog/details/null_mutex.h"
+#include <mutex>
+using qtextedit_sink_mt = qtextedit_sink<std::mutex>;
+using qtextedit_sink_st = qtextedit_sink<spdlog::details::null_mutex>;
+
+using qplaintextedit_sink_mt = qplaintextedit_sink<std::mutex>;
+using qplaintextedit_sink_st = qplaintextedit_sink<spdlog::details::null_mutex>;
+
+} // namespace sinks
+
+//
+// Factory functions
+//
+template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+qtextedit_logger_mt(const std::string &logger_name,
+                    QTextEdit *qtextedit = nullptr) {
+  return Factory::template create<sinks::qtextedit_sink_mt>(logger_name,
+                                                            qtextedit);
+}
+
+template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+qtextedit_logger_st(const std::string &logger_name,
+                    QTextEdit *qtextedit = nullptr) {
+  return Factory::template create<sinks::qtextedit_sink_st>(logger_name,
+                                                            qtextedit);
+}
+
+template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+qplaintextedit_logger_mt(const std::string &logger_name,
+                         QPlainTextEdit *qplaintextedit = nullptr) {
+  return Factory::template create<sinks::qplaintextedit_sink_mt>(
+      logger_name, qplaintextedit);
+}
+
+template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+qplaintextedit_logger_st(const std::string &logger_name,
+                         QPlainTextEdit *qplaintextedit = nullptr) {
+  return Factory::template create<sinks::qplaintextedit_sink_st>(
+      logger_name, qplaintextedit);
+}
+} // namespace spdlog